Mechanical Wood Models; Steam Locomotive - with wind-up spring Build this amazing 349 pieces 3D puzzle. Enjoy building a model of one of the mechanical wonders of the 19th century. If you love DIY and enjoy building amazing things, you'll love this DIY locomotive. A great engineering toy for kids and adults, great for learning how gear transmission work and how potential energy is created and converted into kinetic energy. Get it for yourself, give it as a gift, or build it with your love ones! Some products might need glue, wax and/or batteries. These products are forbidden on international shipping, and might not be included in your package. They can be replaced by any glue that works in wood and any wax. Features: Spring Driven: Precise gear drive by wind up Realistic Design: Steam whistle that spins with motion Retro Style: A wonderful throwback to the great industrial age Specifications: Number of Pieces: 350 pcs Assembly Time: 6 hours Difficulty Level: Difficult, 5 star Recommended Age: 14+ Assembled Dimensions (HxWxD): 14.6x4.7x7.3 inches (37x12x18.5 cm) Packaging Size: 250x370x70 mm Weight: 1420g